Re: pdf with byterange doesn't work, or why content-length is removed by mod_proxy

As Jeff Trawick wrote before, this is a known issue, caused by a bug of
Internet Explorer; According to Microsoft Knowledge Base, IE can't deal
with PDF files properly without Content-Length.

You can read more about it at:
		http://nagoya.apache.org/bugzilla/show_bug.cgi?id=11978

Cahya Wirawan wrote:
> 
> Hi,
> I have problem with my apache 2.0.43, I use it for reverse proxy with
> mod_proxy. the webserver behind my reverse proxy has alot of big pdf
> files, and to make the client only load the necessary pages in pdf,
> we use pdf with byterange. and works fine if the client connect
> the webserver directly without reverse proxy, but if we use reverse
> proxy between this webserver and the client, the client will
> download the whole pdf file.
> after I check the header, I found out that the Content-Length header
> is removed by the reverse proxy.
> 
> here are the  2 headers from reverse proxy and direct conneciton:
> 
> 1. direct connection:
> 
> $ lynx -head -dump http://direct.connection/~cahya/test.pdf
> HTTP/1.1 200 OK
> Date: Wed, 13 Nov 2002 10:55:37 GMT
> Server: Apache/2.0.40 (Unix) mod_ssl/2.0.40 OpenSSL/0.9.6g DAV/2
> Last-Modified: Tue, 12 Nov 2002 15:57:51 GMT
> ETag: "79aa-433936-8ac3fdc0"
> Accept-Ranges: bytes
> Content-Length: 4405558
> Connection: close
> Content-Type: application/pdf
> 
> 
> 2. through reverse proxy:
> 
> $ lynx -head -dump http://through.reverseproxy/~cahya/test.pdf
> HTTP/1.1 200 OK
> Date: Wed, 13 Nov 2002 10:55:28 GMT
> Server: Apache/2.0.40 (Unix) mod_ssl/2.0.40 OpenSSL/0.9.6g DAV/2
> Last-Modified: Tue, 12 Nov 2002 15:57:51 GMT
> ETag: "79aa-433936-8ac3fdc0"
> Accept-Ranges: bytes
> Content-Type: application/pdf
> Connection: close
> 
> So I think, the client download the whole pdf file because of the missing
> of this content-length header. Someone know about this problem?
> I would very appreciate any help or hint,
> thanks
> Cahya Wirawan.

-- 
Eli Marmor
[email protected]
CTO, Founder
Netmask (El-Mar) Internet Technologies Ltd.
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